Delicious Tarragon-Infused Chicken Fricassée

Ingredients

• 4 boneless, skinless chicken thighs (about 1.5 pounds / 680 grams)
• 2 tablespoons olive oil
• Salt and freshly cracked black pepper (to taste)
• 2 tablespoons unsalted butter
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 1 cup (240 ml) chicken broth
• 1 cup (240 ml) heavy cream
• 1 tablespoon Dijon mustard
• 2 teaspoons fresh tarragon leaves, chopped (or 1 teaspoon dried tarragon)
• Zest of 1 lemon
• Juice of 1 lemon
• Fresh tarragon sprigs (for garnish, optional)